View all text of Subpart E [§ 172.400 - § 172.450]
§ 172.436 - RADIOACTIVE WHITE-I label.
(a) Except for size and color, the RADIOACTIVE WHITE-I label must be as follows:

(b) In addition to complying with § 172.407, the background on the RADIOACTIVE WHITE-I label must be white. The printing and symbol must be black, except for the “I” which must be red.